Make a Hi-tech Multi Tool Lego NXT Pencil Case!

Hi, and welcome to this Instructable.
I built this because I'm going back to school soon and I want to show off to my friends my new cool pencil case!
I will give you an guide on how to build a cool lego pencil case but the finished project may look different to mine as i don't have step by step instructions.
My pencil case includes a hands free opening solution,
a pop out watch and a paper shredder (chainsaw).
It will also automatically shut the lid after 1 minute
I will try to upload the programming sample rbt file as soon as nxtlog approves of my project.
Here is a video to see it in action

You Will Need

Lego nxt 2.0 or 1.0,
brain,
paper,
pens,
a small wristwatch (optional)

Step 1

Plan out your pencil case using a piece of paper,
think about the programming and what motor will do, i mean, there is only 3 motors and 4 sensors...
so plan carefully...

Step 2

Build the body, this is where the pens and pencils will be stored

Step 3

Build the motorized lid that will be triggered by the wave of a hand.
All thanks to the ultrasonic sensor:)

Step 4

Build the clock compartment...
This should act like a lock to the pens and will also pop out when the touch the touch sensor

Step 5

BUILD THE PAPER SHREDDER! I CALL IT THE PAPER SAW!

sorry i got excited there but pls pay attention the the gearing ratios

Step 6

Programming, I will try and show you the sample program asap, but for now, you can study
the screenshot of my programming:)
Here's some tips,
use the switch block for the clock compartment.
use loops
and make sure the wires are in the correct place

Finished!

Now just show off to your friends!
Simply wave your hand in front of the ultrasonic sensor, press touch sensor 1 to move the clock compartment, the press touch sensor 2 to activate the PAPER SHREDDER OF DEATH (USE AT YOUR OWN RISK, I AM NOT RESPONSIBLE FOR YOUR IMPORTANT PAPERS TO BE SHREDDED BECAUSE ITS FUN!)
Enjoy and have fun:)